This earpiece has a bone to pick

What's better than putting a microphone right next to your mouth? Turning your whole head into a microphone! That's the goal behind bone-conduction technology, which uses the vibrations of your skull to determine what you're saying. Because it relies on vibrations instead of sound waves, bone-conduction technology has the advantage of isolating your voice from all the background noise (though, one has to imagine that if you were standing right next to a speaker thumping bass, you might still run into some interference).